<template>
    <li>
      <label>
        <input type="checkbox" :checked="todo.done" @change="handleCheck(todo.id)"/>
        <!-- 如下代码也能实现功能，但是不太推荐，因为有点违反原则，因为修改了props -->
        <input type="checkbox" v-model="todo.done">
        <span>{{todo.title}}</span>
      </label>
      <button class="btn btn-danger" @click="handleDelete(todo.id)">删除</button>
    </li>
</template>

<script>
export default {
 name:'MyItem',
//声明接收todo,checkTodo,deleteTodo
props:['todo','checkTodo','deleteTodo'],
methods:{
  // 勾选 or 取消勾选
  handleCheck(id){
    // 通知App组件将对应的todo对象的done值取反
    this.checkTodo(id)
  },
  // 删除
  handleDelete(id){
    if(confirm('确定删除吗')){
      // 通知App组件将对应的todo对象删除
      this.deleteTodo(id)
    }
  }
}
}
</script>

<style scoped>
/*item*/
li {
  list-style: none;
  height: 36px;
  line-height: 36px;
  padding: 0 5px;
  border-bottom: 1px solid #ddd;
}

li label {
  float: left;
  cursor: pointer;
}

li label li input {
  vertical-align: middle;
  margin-right: 6px;
  position: relative;
  top: -1px;
}

li button {
  float: right;
  display: none;
  margin-top: 3px;
}

li:before {
  content: initial;
}
li:hover button{
  display: block;
}
li:last-child {
  border-bottom: none;
}

</style>